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The chemical attachment of poly(ethylene glycol) [PEG] to therapeutic proteins produces several benefits, including enhanced plasma half-life, lower toxicity, and increased drug stability and solubility. In certain instances, pegylation of a protein can increase its therapeutic efficacy by reducing the ability of the immune system to detect and mount an… (More)

This paper describes a channel sounder based on correlation of a maximum-length sequence. The sounder is designed for the evaluation of the absolute path loss and multipath delay spread of a fixed wireless local loop channel at 5.5 GHz. The sounder uses two stage down conversion with the second stage and subsequent processing being done in software,… (More)

This paper presents the development of the physical layer for a Power Line Communications (PLC) system based on Discrete Multi-Tone (DMT) modulation. Simulation is migrated towards a real system by means of emulation. An introduction is given, followed by an overview of the proposed system. The methodology adopted is then discussed and a more detailed… (More)

The simulation methodology used in a study of a wireless local access link is described. The use of complex base-band methods to dramatically reduce simulation times is considered. The model described in this paper includes channel estimation and the 5.5 GHz WLL channel. Verification of the simulation system is discussed and results are presented.

This paper investigates the application of the ETSI HIPERLAN/2 and IEEE 802.11a physical layer standards to the wireless local loop. Simulation results are presented. A simulation model of the 5.5 GHz wireless local loop channel has been parameterised using the results of real channel measurements. This model is combined with models of the transmitter,… (More)